Metal matrix for forming duplicate sound-record cylinders.



PATENTED SEPT. 22,- 1903.

. A. N. PETIT. METAL MATRIX FUR FORMING DUPLICATE SOUND RECORDCYLINDERS.

APPLICATION FILED MAY 15, 1902.

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No. 739,713; PATENTED SEPT. 22, 1903. A. N. PETIT. METAL MATRIX FORFORMING DUPLICATE SOUND RECORD CYLINDERS.

APPLIGATION 211.21) In 15, 1902.

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UNITED STATES Patented September 22, 1903 PATENT OFFICE.

ADEMOR N. PETIT, or NEWARK, NEW JERSEY, ASSIGNQR TO THE INTER- NATIONALPHONOGRAPH AND INDESTRUOTIBLE RECORD COMPANY,

LIMITED, OF LIVERPOOL, ENGLAND.

META L MAl'RlX FOR FORMING DUPLICATE SOUND-RECORD CYLINDERS.

SPECIFICATION formingpart of Letters Patent No. 739,713, dated September22, 1903. Application filed May 15, 19b2 $erial No. 107,464. (No model.)

To all whom it may concern: 7

Be it known that LADEMoR N. PETIT,a citizen of the United States,residing atNewark, in the county of Essex and State of New Jersey, haveinvented an Improvement in Metal Matrices for Forming DuplicateSound-Record Cylinders, of which the following is a specification. p

The object of my invention is to produce a to superior matrix adapted toform a more perfect and commercial duplicate sound record of cylindricalform and preferably made of celluloid than it has heretofore beenpossible to produce in an effort to overcome the harsh 5 and gratingsounds usually incident to records of sound in celluloid or similarmaterials.

In carrying out my invention I employ a master sound-record upon acylinder of wax or other similar or suitable composition and 20 preparethe surface for electrodeposition of a metal, such as copper, with asuitable conductive material. A suitable support is provided for the waxor other similar composition record and means for suspending the 2 5same in the bath in which the electrodeposition takes place. Thissupport and the record during the electrodeposition of metal may berotated, as I have discovered that superior results are obtained byrevolving the record during the electrodeposition of the metal, as

the same obviates any tendency to granulation.

A suitable apparatus is provided not only for the support of the recordduring its rotation, but for the electric apparatus conducting thecurrent. I prefer to provide a suitable support for one end of the waxor other similar composition record, and the respective ends of therecord are preferably surrounded by ring-like parts which form permanentportions of the matrix and are connected by the metal electrodepositupon the surface of the wax or other similar composition record. Thesering-like ends are both peculiarly formed for this purpose, and I preferto insert between one of these rings and one end of the wax cylinder adevice carrying the name of the record and which afterward gives form tothe cylindrical and duplicate soundrecord formed in the matrix. Afterthe ma- 5o trixis formed and the wax record broken out or otherwiseextracted therefrom the same is ready for the reception of the celluloidblank or blank of other suitable material which is to receive from thematrix the soundrecord impressions from the inner surface thereof. Theapparatus and the method of forming the duplicate sound-record cylinderin this matrix forms the subject of a separate application for LettersPatent of even date herewith.

In the drawings, Figure 1 is a vertical section showing the wax or othercomposition cylinder upon which is formed a master sound-record and theparts associated there- -with preparatory to electrodepositing metalupon the surface thereof. Fig. 2 is a plan of the name or title ring.Fig. '3 is a vertical section of the matrix complete. Fig. 4: is asimilar vertical section showing the celluloid blank placed within thematrix before the same is connected up in the apparatus described insaid copending application. Fig.

5 is an inverted plan of the ring or annulus at 'the'upper end. Fig. 6is a vertical sectioncf a modified form of theinvention,

showing the parts assembled for insertion into the chemical bath for theelectrodeposition of the metal; and Fig. 7 is a vertical longitudinalsection of a modified form of 8c the invention, showing the wax cylinderupon which is the master-record suitably mounted for rotation in thechemical bath during the electrodeposition of the metal .upon thesurface thereof. The wax cylinder a is of usual material andconstruction, with an engraved surface of a master sound-record, and theinner walls thereof may be parallel or tapering, as desired. The surfaceof this cylinder at is prepared with conductive material at 2. I providea support or base I) for use during the electrodeposition of metal;also, a ring or annulus c, of metal, receiving the lower end of the waxcylinder a, and a ring or annulus d, of 5 metal, at the upper end of thewax cylinder, said parts (2 and d forming limit-gages at the ends of thewax cylinder and also permanent ends for the matrix. The base I) isprovided with screws 4:, passing through the same intointeriorly-threaded openings in the ring or annulus 0, whereby the twoparts are re|nov ably connected; There are screws 5 in the base band inthe ring or annulus d, to which cireuitwires 6 are connected forconveying the electric current in the liquid bath or battery for theeleetrodepositiou of the metal, and these circuit-wires (i may also besuspending devices for said parts in said bath. The upper end of the waxcylinder at is preferably recessed, and I prefer to provide a name-plate3, preferably of wax and adapted to fit into the upper end of the waxcylinder to close the same and also form a support and a centeringstructure for the metal ring or annulus cl. This ring or annulus (Z iscutaway on the under side from the periphery toward the center, so thatwhen in place, as shown in Fig. 1, there is an appreciable space formedtoward the axial center of the parts, said ring or annulus being ofgreater diameter than the wax cylinder a. The central opening of thering or annulus 0, receiving the lower end of the wax cylinderct, isoutwardly flared or tapered,

providing an annular wedge-shaped space be-v tween the surface thereofand the surface of the wax cylinder.

In forming the matrix in the bath by the action of the electric currentthe metal, such as copper, is not only deposited upon theconductive-material surface of the Wax cylinder a and the surface of thename-ring 3, similarly prepared, but is also deposited upon the flaredsurface of the open center of the ring or annulus cand the undersurfaceof the ring or annulus cl, it being understood that the other metalsurface of the associated parts are to be covered with varnish or someother material to prevent the electrodeposition of metal, except at theplaces desired and hereinbefore stated. The metal is to be depositeduntil it assumes a thickness substantially agreeing with the diameter ofthe ring or annulus d, after which the electrodeposited cylinder c, withrings or annuli c d, form an integral structure, which constitutes thematrix for further use and from which the wax cylinder with the recordis broken out after removing the base or support 17. This matrix isshown in Fig. 3, in which it will be noticed that the opening at thelower end is of the full diameter of the matrix, while the opening atthe upper end is contracted and governed by. the aperture in the ringportion (1.

The celluloid blankf or blank of other suitable material is preferablymade with one end turned over and the other end inturned, and this blankis appreciably smaller than the internal diameter of the matrix and ispassed into the same from the lower larger end, (see Fig. 1,) it beingunderstood that the turned-over end of the blank comes against the upperinclined portion of the matrix, at which place the matrix shows the namein relief.

In the modified form of my invention shown in Fig. 6 the base 12,similar to the base I), hereinbeforedescribed,is provided with a core bintegral therewith or connected thereto, and both parts are preferablyof insulating or non-conducting material, and to the same isadvantageously secured a screw-eye 7, from which the parts collectivelyare advantageously suspended in the bath or battery during theelectrodeposition of metal. In this figure the wax cylinder at, with aconductivematerial surface, the ring or annulus c, and the screws 4 arethe same as the parts hereinbefore described. Upon the upper end of thecore I) I secure a ring d or its equivalent structure, provided withseveral radiating fingers 8, made integral therewith and extending overupon the upper surface of the wax cylinder at in contact with itsconductive surface. This ring is preferably fastened to the core byscrews 9, which also serve as binding-posts for the circuit-wires 10.Secured to the ring or annulus c are screws 5 and circuit-wires 6,similar to those parts employed in Fig. 1, the screws 5 and wires 6 andthe screws 9 andwires 10, together with the ring (1 and the fingers S,constituting devices for a complete electric circuit through the annulusc and the conductive-material surface 2 of the cylinder.

In the modified form, Fig. '7, the base I) and the core I) are centrallyperforated for a shaft 11, the same being rotatably hung in arms 12,suspended from any fixed point, said shaft being provided with a nut 14to clamp the base b and core 11 to the shaft and between a collarthereon and said nut, and on. this shaft is preferably placed a pulley13, surrounded by a band for rotating the shaft, the base 17, core b thering or annulus c, secured thereto by the screws 4, the Wax cylinder a,surrounding the core 19 and a ring (1 placed against the right-hand endof the core b and held thereto by the clamping of the nut 14. The saidring 01 substantially agrees in diameter with the full diameter of thefinished matrix, and in order to bring to the ring d and the ring orannulus c the electric current in suitable form I provide brackets 1516upon the arms 12 and spring-contacts 17, which run upon the surfaces orperipheries of said ring or annulus c and the ring 01 during therotation of the parts in the bath or battery. The arms 12 are to beconstructed for the readyseparation therefrom of the base 6, core b andbase connected therewith, so that the finished matrix may be removed andthe wax cylinder broken out therefrom.

The matrix made as hereinbefore described is substantial, strong, andlasting and eminently adapted for continuous and repeated use in themanufacture of duplicate soundrecords of celluloid or other suitablematerials.

I have discovered that in the elect-rodepo- 'sition of the metal uponthe surface of the master-record when the same is in the bath the bestresults are obtained by starting the operation with one circuit-wire atone end until a substantial or appreciable thickness is obtained,because the electric action is continuous from one end to the other,whereas when two circuit-wires are employed the action of deposition isfrom both ends to the center. This latter manner of operation issatisfactory after the appreciable foundation is made, whereas if theaction is commenced with two wires there will be an appreciable centralline as a result, which is consequently detrimental.

I do not herein limit myself to the arrangement or number of theelectric wires or circuits or to the metal end rings to which theelectrodepcsited metal unites when the parts are revolved in the bath orbattery for form'- ing the matrix and which constitute a part of thematrix. I

I claim as my invention 1. The combination with a base and a waxrecord-cylinder having a conductive-material surface, of a ring orannulus of metal secured to the base receiving one end of therecordrecord-cylinder having a conductive-material cylinder and having atapering central sur face adjacent to the record-cylinder, a ring orannulus and a support for the same at the upper end of therecord-cylinder, said ring having a tapering under surface and a body ofelectrodeposited metal upon the surface of the record-cylinder at itsends joining the said rings or annuli and therewith forming an integralmatrix, substantially as set forth.

2. The combination with a base and a wax surface, of a ring or annulusof metal secured to the base, receiving one end of the recordcylinderand having a tapering central surface adjacent to the record-cylinder, aring or annulus and a support for the same at the upper end of therecord-cylinder, said support having an inclined outer surfaceengravedwith the name of the record, which name is afterward transferred to theinner surface of the matrix, said ring having a tapering under surfaceand a body of electrodeposited metal upon the surface of therecord-cylinder at its ends joining the said rings or annuli, the saidrings or annuli therewith forming an integral matrix, substantially asset forth.

3. A metal matrix adapted for the reproduction of duplicate sound-recordcylinders of celluloid orsimilar material, the same comprising endsformed of metal rings or annuli and an intermediate portion ofelectrodeposited metal joined therewith by the electrodeposition of, themetal as an integral whole.

4. The combination with a base and a wax record-cylinder having a condnative-material surface, of a ring or annulus of metal secured to thebase receiving one end of the recordcylinder and having a taperingcentral surface adjacent to the record-cylinder, a body ofelectrodeposited metal upon the surface of the record-cylinder joiningthe tapering central surface of the ring or annulus at one end andtherewith forming an integral matrix.

5. A metal matrix adapted for the reproduction of duplicate,sound-record cylinders of celluloid or similar material, the samecomprising a ring or annulus and a body portion of electrodepositedmetal joined thereto at one end by the electrodeposition of the metaland constituting an integral whole, substantially as set forth. a

Signed by me this 6th day of May, 1902.

ADEMOR N. PETIT.

